Lock



July 16, 1940.

F. H. HARP Loox Original Filed April 17, 1933 3 Sheets-Sheet l l INVENTOR.

fin/:M127 #up ATTORNEY July 16, 1940. F, H HARP 2,207,801

LOCK

original Filed April 17, 1953 s sheets-sheet 2 IN V EN TOR.

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A TTORNEXE g F. H. HARP Ju'y 16, 1940.

LOCK

Original Filed April 17, 1933 3 Sheets-Sheet 5 my. /4 my. /5

. v INVENTOR.

awk/m l Harp Patented July 16, 1940 UNITED STATES PaiizNrv oFFlcE LOCK Franklin H. Harp, Indianapolis, Ind., assignor to Frank E. Best, Inc., Seattle, Wash., a corporation of Washington s claims. (ci. 'w-14s) This invention `relates to locks and this application is a division of my application, Serial No. 666,520, led April 17, 1933, Patent No. 2,138,- 856, issued December 6, '1938. y

The general object of 'my invention is to improve the construction of locks generally, and to render the same more eiicient and reliable in operation. y

The inventiomas herein disclosed, is embodied in a door lock of the form commonly' termed a unit lock, but it will be understood that the invention is not to be restricted to so called unit locks, but thatmany features of the same are applicable to locks of other types.

An object of the invention is to provide novel and efiicient means for locking one or both knob shanks against turning, said means being selective whereby it may be rvused to lock one knob shank and leave the other free to rotate or to lock both knob shanks or lto lock certain mechanism which will prevent retraction of the bolt by a key, and at the same time lock one or both knobs as mayr be desired. i This knob shank locking means may be controlled by a single small turn knob operable from ythe inner side of the door or in some instances by either one or two turn knobs which are positioned on opposite sides of a door. by having two locking slides which may be movable `simultaneously in opposite directions, or which may be movable independently of each other.

Another object is to provideay lock which may readily be installed on a right or left hand door.

Other and more specific objects of the invention will be apparent from the following description taken in connection with the accompanying drawings.

In the drawings Fig. 1 is an elevation with certain cover plates and knob parts removed, o i a lock constructed in accordance with my invention. i

Fig. 2 ls a sectional View of said lock substan- Ulf;

.ff-i.. 25

These objects may be accomplished tially on vbroken line 2 2 ofFig. 1, parts lbeing and partly in elevation illustrating the operation of a bolt memberembodied in this lock, the bolt -member being shown in fully retracted position and a bolt blocking member being shown, partly by dotted lines in a blocking position.

Fig. 8 is a fragmentary View similar to Fig. 7, except that the bolt member is illustrated as blocked by the blocking member.

Fig. 9 isA a detached elevationshowing an alternative form of locking slide which cooperates with the bolt blocking member.

Fig. 10 is an elevation similar to Fig. 9, showing another alternative type of locking slide and an alternative type of blocking member.

Fig. l1 isa detached plan view showing the use of two locking slides arranged to be moved simultaneously in opposite directions by a single actuating member.

Fig. 12 is a detached plan view illustrating an alternative type of slide operating means.

Fig. '13 illustrates another alternative type of slide operating means.

. Figs. 14 and 15 are detached plan views of two types of bolt retracting members embodied in this lock.

Fig. 16 is adetached view in elevation showing two abutting lock spindles of a type which may be used when a separate lock is provided in each knob of the lock and when an independent throw is controlled by each lock.

Fig. 17 is a detached elevation showing two overlapped lock spindles.

Fig. 18 is a sectional View through a knob shank illustrating the manner of providing an angularly offset hole for cooperation with a locking pin whereby the bolt may be held retracted.

Figs. 19 and 2O are detached elevations respectively of two tubular supporting members for the knob shanks.

Fig. 21 is a detached plan View of a member which is used to` secure the knob shanks in assembled relation in the lock.

Fig. 22 is a detached view partly in elevation and partly in section showing two thumb turns on opposite sides of a lock each operating a separate locking slide.

Like' reference numerals -designate like parts throughout the several views.

Referring to Figs. 1 and 2, I show a knob which embodies a knob cylinder or lock case recessed as at 2| to receive a primary lock 22, preferably of pin tumbler type. The cylinder 20 forms a body about which the knob ls built. The knob may consist of an inner shell portion 23 and an outer shell portion 24. The outer shell portion 2t preferably forms the outer end and peripheral portion of the knob and overlies a portion of the end of the cylinder 20 and has an inwardly protruding annular rib 25 fitting over the end of the cylinder 20, said rib serving as a means for correctly positioning the shells relative to the outer end of the cylinder. The end of the outer shell is further cut away as at 25, to afford access to the end of the lock. The inner shellportion 23 is partially disposed within the outer portion and is frictionally engaged by the outer shell portion so that the shell members will turn together as a unit and said inner shell portion has a neck 21 which is press iitted tightly onto the cylinder member 2i.) and further has an inwardly extending iiange portion 28 which overlaps the marginal part of one side of an external annular flange 30 which is integral with or otherwise xedly secured to a knob shank 3l. The flange 28 of the inner shell 23 is preferably secured to knob shank ilange 30 by a shear pin 32, so that it will shear off if excessive torque is exerted on the knob. The knob shank 3|v is arranged to retract a lock bolt as hereinafter described, when it is turned.

The primary 'lock 22 which is disposed in the cylinder 25 may be of a well known pin tumbler type. The cylinder 2li has a flange portion 5l near its inner end which separates the compartment in which the primary lock 22 is disposed from a compartment 52 in which throw mechanism is positioned. This throw mechanism embodies a throw disc 53 having two throw pins 56l rigid therewith and protruding telescopically into the primary lock 22 whereby the throw disc 53 may be turned by the insertion of a key in the primary lock. A retainer plate secured to thehousing flange 5I retains the disc 53 in place and` has an opening 55 therein to afford clearance for the two throw pins 54. protruding from the inner face thereof and extending through an elongated hole 58 in one end of a throw link Sil. The other end of the throw link 65 has a hole 6l which ts over a throw lever pin 52 on a throw lever 63 which is secured to the lend of a throw spindle 54, preferably of square cross section, by which latch mechanism of a form 'hereinafter described is operated. The throw linkkll is thus positioned so that it operates freely between the throw lever 63 and the throw disc 53. When the throw disc 53 is in the normal inoperative position which it must occupy at all times when the key is removed from the lock the crank pin 51 on said throw disc 53 will be in axial alignment with the throw spindle 5l? and both will coincide with the com'- mon axis of the knobI spindle and the knob. In the event the shear pin 32 is sheared off and the knob is turned without turning the knob shank, when the throw pin 51 and throw spindle lill are thus positioned `with their axis common to the axis of the knob and knob shank, the throw disc 53 will likewise be free to rotate on this common axis but the knob spindle 64 will not be rotated and consequently the latch mechanism will not be retracted. 'Ihisallows the shear pin 38 of a knob to be Sheared off and the knob to be rotated by an unauthorized person when the latch mechanism is locked without operating the latch mechanism or damaging any part of the same, thev shear means and The disc 53 has a crank 51v throw means thus cooperating to prevent the lock fromy being opened or seriously damaged by persons seeking to force the lock.

If the throw disc is rotated by insertion of the proper key in the lock the crank pin 51 moving around on the arc of a circle, see Figs. 5 and 6, will exert a thrust'on the link E0, which thrust will be transmitted to the throw lever pin $2 thus moving the throw lever 63- and turning the throw spindle 65. The turning of the throw spindle 64 may retract a latch bolt in a manner hereinafter described. The elongation vof thehole 58 in the throw link Si) affordsy axis of the knob and the knob shank and makes A knob-shank Abearing-tube ,55, Figs. 1,2, 19

and 20, is provided for the reception of the knob Shanks 3l. This bearing tube 65 is supported in a bearing tube holder li which is secured, as by screws 51 toa lock t8. A set screw 15. serves :sol

to clamp the bearing tub-e 65 to the bearing tube holder 66. The bearingtube t5 is cut away as at 1l to afford clearance for-the operation of a plurality of throwjme'mbers 12, 13 and 74, n The 'two throw members 12 and 13 are shaped to iit within counterbored and notched portions 15 in the ends of the knobshanks 3| whereby they will be moved rotatively by the turning vof these knob shanks. These ktwo throw members are hereinafter termed vknob throws. When a pri'- mary lock 22 is A'provided in one knob only, as illustrated inj Fig. 2, then only one lock throw 14 ls provided and this lock throw is operated by the single spindle 64. lnl some instances where a vprimary lock 22 is provided in 'each knob twooverlapped spindles 16 and 11 of a form shown in Fig. 17, may beused said spindles rotating together a's a unit and operating a single lock 'throw andk being Vcontrolled by either of said locks,the throw mechanism, 'shown in Figs. 3 and 4, which connects the spindles with'the locks making it possible to operate the spindles 16 and 11 by the insertion of a key in either lock without in any way vaffecting lthe other lock. In this type of mechanism each primary lock 22 is capable of performing th-e same function as respects the latch mechanism. Suitable springs, hereinafter described always tend to return the locking spindles to normal position when they are released and the primary pin tumblerA locks require that the key must always be brought back to the saine position before it can be with-- drawn from the lock; this always insures correct positioning of the primary `lock throw parts and the spindles when the lock is v.not in vactual use.

The several spindles may bei/of' v`square cross section, the openings 3 l in the knob shanks may be circular, the openings 12 and 13 in the hub portions of the knob throws 12 and 13 may also be circular so that the knob and knob shanks are not rotatively Vconnected with the stances it may be desirable to have a primary lock 22 in each knob and to have each of these primary locks operate a diierent lock throw member, Fig. 16, whereby each primary lock may'exercise a different control over the latch mechanism and whereby the latch mechanism controlled by one of thesev primary locks can not be operated by the other primary lock. In this instance I replace the medial lock throw member 14 b-y two lock throw members 80 and 8| Fig. 16, and provide two shorter shanks 82 and 83 which protrude respectively into the lock throw `members 80 and 8| and may substantially abut against each other end to end. This provides a separate control by the primary lock in each knob, making it possible to render either lock ineffective to retract the latch bolt.

Other variations of the throwy members 12, 13, 14, 80 and 8|, may-be provided, as for instance, these vthrows may all be secured together or may all be made in one piece in certain types of locks where no key operated primary lock mechanism is used and where it is desired to rigidly connect the two door knobs together. Two pairs of slots 84, Fig. 19, are provided in the bearing tube v|55 and extend partially around said bearing tube 65 adjacent opposite ends of the cut away portions 1| for the reception of flat prongs 85 on U shaped clips 86, Fig. 21, by which the knob Shanks 3| are secured in assembled relation within the bearing tube 65, the said prongs 85 fitting Within annular grooves 81 in the knob shanks. These clips form a very eicient means for holding the knob shanks and permit a very quick and easy assembly or disassembly without the use of special tools. A quick and easily removable slide plate 88 forms a closure at the rear end of the lock case. This slide plate also retains the clips 86 in proper position when the lock is assembled.'

The bearing tubeholder 66 has'two arms 69 protruding from the upper end thereof at diametrically opposite locations and positioned in conltact with the sides of the bearing tube. These arms 89 each have a plurality of spaced apart holes 90 therein and the bearing tube is correspondingly provided with holes 9| which register with the holes in the arms 69. The knob shanks '8| are also provided with holes92 which registerv with the holes in the arms 89 and bearing tube 65. These several holes constitute a part of the means for lockingy the knobshanks 3| against turning. Only one set of these holes for each knob shank need be occupied by pins for locking the knob shanks. The elements which lock into these holes 90, 9|, 92, are in the nature of pin means 93 in a locking slide 94. This locking slide may be varied in form and in some instances two of these slides may be used as hereinafter set forth. The slide shown in Figs. 1, 2,v and 7 may comprise a flat face portion 95 to which the pin or pins 93 are secured and a fiat shank portion 96 positionedat right angles to the face portion 95 and guided for sliding movement in notches 91 which are provided in guide members 98 and 99, Fig. 8, said guide members being iixedly secured to the lock case 68. A slide retainer brack-y et |00, is provided for holding the slide shank 96 down. The top edge of the slide shank 96 has a shoulder thereon for engagement with the forward edge of the slide retainer bracket |00, whereby rearward movement of said slide is limited and a notch |02, is provided in the top edge of said slide shank just forward of the shoulder |0|, for the reception of an arm |03, on a thumb operated spindle |04. An upright post |05, hav ing a pin |06, on the top end thereof forms a positioning and bearing means for the spindle |04, and said spindle |04 is further supported for rotation within Vthe cover |01, of the lock case 68. The lower edge of the slide shank 96 has two or more notches |08 provided therein for engagement by a V shaped element |09 provided on a ilat spring I0, see Figs. 2 and '1. Obviously oscillating movement of the thumb turn spindle |04 will move the slide back and forth and cause the vpins 93 to enter or to be withdrawn from the holes 92 in the knob Shanks 3| thus locking or unlocking the knobs as respects turning move'- ment thereof. If it is desired to provide for locking only one knob then only one pin r93 is provided on the plate 95. If both knobs are to be locked then two pins 93 are provided as shown on the slide face 95 in Fig. 8, so that pins will enter holes in both knob shanks. The locking of the inside knob along with the outside knob is particularly desirable in the case of some doors.

Where the inside knob is thus locked it is desirable to operate the locking slides by means of a key or to lock the turn knobs so that they can not be moved to released position until after the door has been opened by a key. If it is desired to prevent operationl of the lock by a proper key then an additional pin 93', Fig. 10, may be provided forentrance into a notch in the hub portion of the key throw 14, see Fig. 15. i Also in instances where two key throws 80 and 8 Fig. 16, are 'used this pin may enter corresponding notches ||2 of both of said key throws to pre- Vent operation by the primary lock mechanism in either knob by the use of a proper key.

In Fig. 11, I have shown two locking slides ||3 and I|4 guided in the guide members 98 and 99 in spaced apart relation, one on each side of a turn knob shank ||5 and engaged by oppositelyf extending arms ||6 and ||1 on the turn knob shank I5 whereby said two slides will always be moved in opposite directions by turning movement ofthe turn knob shank ||5. The slides ||3 and ||4jeach have front plates ||8 thereon and i,"

each front plate may have one or more pins 93. The pin carrying portion ||8 of the plate ||4 is Aoffset whereby it-will clear the front portion |8 of the other locking slide. The pin 95 of one slide may be arranged to engage with one knob tions namely; one position for locking one knob,

another position for locking the other knob, and

a third or neutral position in which both door knobs are .'unlocked. These three positions are secured and definitely predetermined by provid-` ing in the bottom edges of the slides, see Fig.' 9, three notches |2| which are arranged to be engaged by the inverted V shaped detent |09 on the spring ||0, one of said notches determining each of the positions above mentioned.

An indicator |8| may be secured by a pivot |82 to the bracket member 98 and engaged by an inclined front edge |63 on the locking slide 9d When locking slide 94 is in locking position the indicator is moved out through a hole |64 in the lock case, thus indicating visibly that' the lock ls in a locked condition. When the locking slide 94 is retracted a spring |65 retracts the indicator |5| and causes it to disappear inside of the lock case.

If the movement of the locking slidesas for instance, -slides ||3 and H, is to be controlled by the primary lock or locks then a throw member |22 of the form shown inFig. A12, is preferably provided for use in cooperation with the lock spindles. This throw |22 has two arcuate recesses |23 for the reception oi disc like portions |24, of links |25. v The links |25 have hook portions |25 on vthe outer ends thereof for engagement within holes |21 in the face portions ||8 of the locking slides. H3 and iM. rilhe hook portions |26 are shaped so as to aiord a limited amount of lost ymotion between the links |25 and the slides and this lost motion always allows the throw |22 to return to its normal inoperative position without disengaging the locking slides after said locking slides have been moved into a locking position. If the two slides H3 and ||i are interconnected by the member ||5| ||a`| il then only one of the links |25 need be Used but if said two locking slides are not so interconnected then two links |25 will be used. If only one locking slide is to be moved then obviously onlyone link |25 will lbe used. lif two locking slides are to be independently controlled then two throws S22 are pro vided, each throw is connected b-y one link |25 with one locking slide and the locking slides are not interconnected.

d Another mechanism for controlling one or both locking slides H3 and H by means of the lock throw |22 is illustrated in Fig. 13, in which l provide an extension lug |22 on each slide each extension lug |29 being positioned for engagement with an arm |23 on the throw member |22. Said extension lugs are preferably used in connection with the slide interconnecting member ||5-||5-||'|. This mechanism has less lost motion than the slide operating mechanism shown in Fig. 12.

The lock case 68 is provided with a face plate itil having an opening |3| for operation of a bolt member |32 of conventional hollow vtype which is mounted on a pivot |33. A bolt trip |35. Figs. 1, 7 and 8 is secured within the .bolt member |32 by a pivot |35 and has 'a catchportion |36 which projects out of the bolt member into the lock housing. A torsion springwl urgesl the bolt trip |311,` into the position shown in Fig. 2. This bolt trip |3| has another pivot |38 which is connected with a sub-tonguemember |39 which extends into the lock case and rests upon the bracket Mill., The sub-tongue member |39 has a slot |40 engaged bya finger |4| on a tongue plate m2 which is guided tor sliding movement in the lock case. A spring |45 engages withv a lug llli cn'the tongue plate |22 and urges said tongue plate |22 toward theforward end of the lock housing. The central portion of the tongue plate |42 is cut away for clearance purposes and two wings |1215 are provided on the rear end of the tongue plate for engagement with the several throw members which are operated either by turning of the knobs or by turning of keys in the locks. When one of the throw members 52, 13, or 'It is turned in either direction it will engage with one oi the lwing members |65 and simultaneously retract thetongue plate EQ2, the sub-tongue |39 and the bolt |32. When the bolt |32 is retracted by pressure due to the closing of the door, the slot |40 in the sub-tongue allows retractile movement of ,the

bolt andsubftonguewithout moving thetongue plate or turning theknobs thus saving wear on these parts. zi-compression spring |58 engages with a memberr|59 'in-the bolt member 2,and yieldingly urges said Ibolt member |32 outwardly.

The action of the springlil'l urges the bolt trip |34 intoy a positionin which the ycatchmember.

|36 ismogved downinto thepath of abolt b1ock`v ing member rlli-6 which-is carried` on a pin |41 and partiallyguided in the bracket ||l. The pin .|137 extends ,out throughl the side of the lock casev and is positioned rwhere it mayA engage .aldoor jamb or plate |48 and be moved thereby into obstructing .position relative to the catch member |323 of thebolttrip Hill..V A spring |50 exertsfan outward .pressure on the pin |f|'| and blocking.

member |46.4 When a `pull is exerted on the sub`` tongue |39!l the first movement produced by this pull will be a rocking movementof the bolt trip |32` which will move the catchmember |38 out of v the path,r` of they blocking member |45 after which, further retractile movement of the subtonguelf will retract the bolt |32 into-a posi tion as shown in Fig. 7.. Iian attempt ismade to press the bolt |32 back when thedoor is closed vand the blockingmember M6 is.in obstructing position the. catchmember |36 will engage the blocking member iii as shown in Fign,J and block tlieretractionof rsaid bolt. This is a safety 'eature which prevents opening of ythe lock iby insertion of athin tool between the face plate i and the, strike plateil of the lock. When the door is not ifullyclosed the blocking member itt will not vbe in obstructing position and-the bolt |32 may be retracted by pressure, in the usual. way, as by the striking of said bolt'against astrike pia'te in the `closing of-.fthe door. ForV this reason the blocking memberld doesvnot interfere with the normal voperation of'the'bolt One device also be provided for locking :the

slidemechanism so thatA the thumby turn'knobs can not be moved when the `door is open land another device may lockl the thumb turn knobs when theedoorf is closed.4 In Fig. 19, I havev shown means Vwhich will lock eithert one `or two slides and the thumb. turnzknobs which are connected hook portion |533 will be clearI `ofl the catch mem--v ber |52 except when. -the blocking member vis moved inwardly by the closing ofthe door. When this slide and thumb .turn locking means is `.used .it is possible to move the thumb turn andlocking slides freely when the door is'open but they are both locked as soon as the pin |131 is moved inwardly. by the closing of the door. Thismeans mayfbe. Iused in connectionA with two locking slideswhich are interconnected in the manner shown in Fig. 1l. This condition may be desirable where thumb turn controlled means are provided for locking both the inside and the out-" side knob, or .where only the outside knob; is locked by a thumb turn on the inside of the Ydoor and there isdanger of: a personl onthe outside reaching the thumb turn through Aa-transom-or by -breakingaglass in the door.v I

i Inlig.r 10,==1 havefsho'wn means forlocking slide |55, and thereby locking a thumb' turn whichl may.l be connected with said slide, when a door is open andwhenthe blocking member |46" isi inv nonobstructing position. `This means may'comprise a catch'member |56 on a locking slide- |55,'said catch member |56 being arranged to be engaged bya hook-like portion |51 on a blocking member |46 of modified form. When the pin of the blocking memberrMB is allowed to move outwardly by reason ofthe door being open the hook-like portion |51 may engage with the catch member |56. This means for prev` venting operation `ofthe-thumb turnwhen the. door is` open' may be used where the setting of a thumb turn on the inside of the 'door will preventl retraction of the bolt by the use of a key in the lock on the outside and'may be desirable in hotel locks which are provided with locking slidemeans operated vby a thumb turn on the inside and having a pin 93 positioned to enter the notch in the lock controlled throw member 14. If the thumb turn is locked against movement by locking the slide |55 in retracted position when the door is open it prevents a person from inadvertently moving said thumb turn into a locked position, in which operation from the outside by a key is blocked, then closing the door from the outside and permitting the bolt to snap locked with the locking slide in locking engagement with the key operated throw member whereby the door can not be opened by a key from the outside. This feature is useful in hotel locks as it prevents guestsfrom locking themselves out of their rooms so that they cannot get in even though they have their key. In some instances hook member |51 shown in` Fig. 10, may be wide enough to engage with suitable catch portions on two slides which are positioned side by side or it may drop back of the member |56 as indicated by dotted lines, Fig. 10, and lock said slide in the forward position.

A lockl 22 may be provided in one or both knobs as hereinbei'ore described. When one lock is used it may operate through a throw member 14 to retract the bolt |32. When twoy locks are used both may operate on the same throw member 14 as shown in Fig. 1'7, or each may operate independently through throw members 80 and 8 I, as shown in Fig. 16. This provides means for the direct operation of the'bolt by the lock or locks.

In Fig. 18, I have shown a cross section of a knob spindle 3| having the hereinbcfore described holes 92 therein for the usual locking function and further having other holes |60 positioned at an angle to the holes 92 whereby the said knob shank may be turned through an angle sufficient to fully retract the bolt |32 and then locked in a position in which the bolt is held retracted by moving one of the locking slides so that a locking pin is projected into one of the holes |60. This makes it possible for a door which is used a great deal to be opened and closed without turning the knobs or moving the bolt at each opening and closing movement of the door thus saving much wear on the bolt.

The operation of the several units, embodied in this lock has been set forth in the foregoing description and the general operation of the lock may be briefly summarized as follows:

The lock is adapted for installation in the usual manner on any door and the several parts of they lock may be varied to suit the requirements of ne installation. The knob shanks are locked or unlocked by movement of the locking slides which movement'either moves the locking pins int the holes in the knob Shanks or withdraws said pins from said holes. These locking slides may be moved by the thumb turn knobs as illustrated in Figs.'1, 2, 11 and 22 or theyy may be moved by key controlled throw means of the type illustrated in Fig. 12, or'of the type illustrated in Fig. 13, or a combination of the thumb knob and key controlled throw means may be used. Either one or two locking slides may be used and each slide may carry pins lfor locking either one knob shank or both knob Shanks and may also carry a `pin for locking a throw member which` is controlled by the use of a key ina primary lock mechanism. A primary lock mechanism may be'y The control of the locking slides by the blocking member, as illustrated in Figs. 9 and 19 is an important feature of the invention as it affords a means for rendering the thumb turn members inoperative under certain conditions. The throw mechanism which interconnects the primary lock and the lock spindle is also an important feature of the invention.

The foregoing description and accompanying drawings clearly disclose a preferred embodiment of my invention but it will ybe understood that this disclosure is `merely illustrative and such changes in the invention may be made as are fairly within the scope and spirit of the following claims.

I claim:

1. Slide means for use in lock mechanism having two rotatably mounted knob shanks, embodying two locking slides mounted for longitudinal movement, means on each of said locking slides positioned to engage with and lock a knob shank when the locking slide is moved toward the knob shank, and a slide moving means connected with both of said slides and adapted to move the two slides simultaneously in opposite directions.

2. Slide means for use in lock7 mechanism having two rotatably mounted knob'shanks, embodying two locking slides mounted for longitudinal movement, means on each of said'locking slides positioned to engage with and lock a knob shank when the locking slide if moved toward the knob shank, a slide moving means vconnected with both of said slides and adapted to move the two slides simultaneously in opposite directions, and thumb turn means connected with said' slide movin-g means for operating the same.

3. Slide means for use in lock mechanism having two rotatably mounted knob Shanks, embodying two locking slides mounted for longitudinal movement, means on each of said locking Slides positioned to engage with and lock a knob shank when the locking slide is moved toward the knob shank, slide moving means connected with both of said slides and adapted to move the two slides simultaneously in opposite directions, and key actuated means operatively connected with said slide moving means for moving the same.

4. Slide means for use in lock mechanism having two rotatably mounted knob Shanks, comprising two locking slides mounted for longitudinal movement, means on each of said locking slides positioned to engage with and lock a knob shank when the locking slide is moved toward the knob shank, a throw member operatively connected with one of said locking slides, lock controlled lIl() means for oscillating said throw member in two directions, and lever means operatively connecting said two slides for compelling simultaneous lon'gitudinal movement of said two slides in opposite directions.

5. Slide means for use in lock mechanism hav ing two rotatably mounted knob shanks, comprising two locking slides mounted for longitudinal movement, means on each of said locking slides positioned to engage withv and lock a knob shank when the locking slide is moved toward the knob shank, a throw member having a neutral position, a lock controlled spindle for oscillating said throw member in both directions from the neutral position, two links each having one end connected with said throw member, and means providing moved into locking position byoscillation of said throw member.

6. Slidemeans for use in lock mechanism haw ing two rotatably mounted knob Shanks, comprise ing two-'locking slides mounted for longitudinal movement, means on each of said locking slides positioned to engage withr and lock a knobv shank when the locking slide is moved toward the knob shank, a throw member having two arms extendingv in opposite directions', a lock controlled spindle for oscillating said 'throw' member inA two directions from a neutral position, lever .means pivoted between said two locking slides and hav- 

